The Experts below are selected from a list of 54591 Experts worldwide ranked by ideXlab platform
Moussa Gomina - One of the best experts on this subject based on the ideXlab platform.
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Multi-physical properties of a structural Concrete incorporating short flax fibers
Construction and Building Materials, 2017Co-Authors: Jonathan Page, Fouzia Khadraoui, Mohamed Boutouil, Moussa GominaAbstract:An experimental investigation was undertaken on the physical characterization of a flax fiber-reinforced Concrete (FFRC) in both fresh and hardened state. The objective of this study is to provide guidance for the mix-design of these FFRC. The study was conducted from two points of views improving the workability of the Concrete in a fresh state and improving the flexural strength in the hardened state. Several parameters have been studied independently as fiber length, fiber content, or the paste content. The characterization of flax fibers highlighted a high water absorption capacity which must be taken into account for the Concrete mix-design. In addition, the flax fibers significantly impact the compactness of granular skeleton. For the characterization of Concrete, Testing in the fresh state showed a significant decrease of the workability of Concrete with the addition of flax fibers. However, the use of shorter fibers, allows to reduce this damaging influence on the fresh Concrete workability. Moreover, increasing the paste content allows compensating this fluidity loss. In the hardened state, the increase of the fiber content enhances the flexural strength, but a decrease of the compressive strength is observed. A greater porosity of the Concrete was also observed with the incorporation of flax fibers. An increase in porosity was also observed when increasing the paste content. (C) 2017 Elsevier Ltd. All rights reserved.
Jonathan Page - One of the best experts on this subject based on the ideXlab platform.
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Multi-physical properties of a structural Concrete incorporating short flax fibers
Construction and Building Materials, 2017Co-Authors: Jonathan Page, Fouzia Khadraoui, Mohamed Boutouil, Moussa GominaAbstract:An experimental investigation was undertaken on the physical characterization of a flax fiber-reinforced Concrete (FFRC) in both fresh and hardened state. The objective of this study is to provide guidance for the mix-design of these FFRC. The study was conducted from two points of views improving the workability of the Concrete in a fresh state and improving the flexural strength in the hardened state. Several parameters have been studied independently as fiber length, fiber content, or the paste content. The characterization of flax fibers highlighted a high water absorption capacity which must be taken into account for the Concrete mix-design. In addition, the flax fibers significantly impact the compactness of granular skeleton. For the characterization of Concrete, Testing in the fresh state showed a significant decrease of the workability of Concrete with the addition of flax fibers. However, the use of shorter fibers, allows to reduce this damaging influence on the fresh Concrete workability. Moreover, increasing the paste content allows compensating this fluidity loss. In the hardened state, the increase of the fiber content enhances the flexural strength, but a decrease of the compressive strength is observed. A greater porosity of the Concrete was also observed with the incorporation of flax fibers. An increase in porosity was also observed when increasing the paste content. (C) 2017 Elsevier Ltd. All rights reserved.
Paul E. Stutzman - One of the best experts on this subject based on the ideXlab platform.
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Analysis of CCRL proficiency cements 151 and 152 using the Virtual Cement and Concrete Testing Laboratory
Cement and Concrete Research, 2006Co-Authors: Jeffrey W. Bullard, Paul E. StutzmanAbstract:To test the ability of the Virtual Cement and Concrete Testing Laboratory (VCCTL) software to predict cement hydration properties, characterization of mineralogy and phase distribution is necessary. Compositional and textural characteristics of Cement and Concrete Reference Laboratory (CCRL) cements 151 and 152 were determined via scanning electron microscopy (SEM) analysis followed by computer modeling of hydration properties. The general procedure to evaluate a cement is as follows: (1) two-dimensional SEM backscattered electron and X-ray microanalysis images of the cement are obtained, along with a measured particle size distribution (PSD); (2) based on analysis of these images and the measured PSD, three-dimensional microstructures of various water-to-cement ratios are created and hydrated using VCCTL, and (3) the model predictions for degree of hydration under saturated conditions, heat of hydration (ASTM C186), setting time (ASTM C191), and strength development of mortar cubes (ASTM C109) are compared to experimental measurements either performed at NIST or at the participating CCRL proficiency sample evaluation laboratories. For both cements, generally good agreement is observed between the model predictions and the experimental data.
Fouzia Khadraoui - One of the best experts on this subject based on the ideXlab platform.
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Multi-physical properties of a structural Concrete incorporating short flax fibers
Construction and Building Materials, 2017Co-Authors: Jonathan Page, Fouzia Khadraoui, Mohamed Boutouil, Moussa GominaAbstract:An experimental investigation was undertaken on the physical characterization of a flax fiber-reinforced Concrete (FFRC) in both fresh and hardened state. The objective of this study is to provide guidance for the mix-design of these FFRC. The study was conducted from two points of views improving the workability of the Concrete in a fresh state and improving the flexural strength in the hardened state. Several parameters have been studied independently as fiber length, fiber content, or the paste content. The characterization of flax fibers highlighted a high water absorption capacity which must be taken into account for the Concrete mix-design. In addition, the flax fibers significantly impact the compactness of granular skeleton. For the characterization of Concrete, Testing in the fresh state showed a significant decrease of the workability of Concrete with the addition of flax fibers. However, the use of shorter fibers, allows to reduce this damaging influence on the fresh Concrete workability. Moreover, increasing the paste content allows compensating this fluidity loss. In the hardened state, the increase of the fiber content enhances the flexural strength, but a decrease of the compressive strength is observed. A greater porosity of the Concrete was also observed with the incorporation of flax fibers. An increase in porosity was also observed when increasing the paste content. (C) 2017 Elsevier Ltd. All rights reserved.
Mohamed Boutouil - One of the best experts on this subject based on the ideXlab platform.
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Multi-physical properties of a structural Concrete incorporating short flax fibers
Construction and Building Materials, 2017Co-Authors: Jonathan Page, Fouzia Khadraoui, Mohamed Boutouil, Moussa GominaAbstract:An experimental investigation was undertaken on the physical characterization of a flax fiber-reinforced Concrete (FFRC) in both fresh and hardened state. The objective of this study is to provide guidance for the mix-design of these FFRC. The study was conducted from two points of views improving the workability of the Concrete in a fresh state and improving the flexural strength in the hardened state. Several parameters have been studied independently as fiber length, fiber content, or the paste content. The characterization of flax fibers highlighted a high water absorption capacity which must be taken into account for the Concrete mix-design. In addition, the flax fibers significantly impact the compactness of granular skeleton. For the characterization of Concrete, Testing in the fresh state showed a significant decrease of the workability of Concrete with the addition of flax fibers. However, the use of shorter fibers, allows to reduce this damaging influence on the fresh Concrete workability. Moreover, increasing the paste content allows compensating this fluidity loss. In the hardened state, the increase of the fiber content enhances the flexural strength, but a decrease of the compressive strength is observed. A greater porosity of the Concrete was also observed with the incorporation of flax fibers. An increase in porosity was also observed when increasing the paste content. (C) 2017 Elsevier Ltd. All rights reserved.